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Table A2.2 CH4 and N2O emission factors for liquid fuels (in transport)

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Fuel type(s) Units New emission factors Old emission factors Source of new emission factors

Petrol

tCH4/PJ

18.51

60

IPCC Tier 2 (Table I-27) mid point grossed down

Diesel

tCH4/PJ

3.81

13

IPCC Tier 2 (Table I-30) grossed down

Fuel oil

tCH4/PJ

6.65

14

IPCC Tier 2 (Table I-48) grossed down

Aviation fuels

tCH4/PJ

1.9

1.5

IPCC Tier 2 (Table I-47) grossed down

LPG

tCH4/PJ

28.5

40

IPCC Tier 2 (Table I-44) grossed down

Petrol

tN2O/PJ

1.42

3

IPCC Good practice (Table 2.7) grossed down

Diesel

tN2O/PJ

3.70

3

IPCC Good practice (Table 2.7) grossed down

Fuel oil

tN2O/PJ

1.9

1.8

IPCC Tier 2 (Table I-48) grossed down

Aviation fuels

tN2O/PJ

1.9

1.1

IPCC Tier 1 (Table I-8) grossed down

LPG

tN2O/PJ

0.57

2.8

IPCC Tier 1 (Table I-8) grossed down

1 The new factors apply from 1993 onwards (Hale and Twomey, 2003).